A ship is 220 metres from a large cliff when it sounds its horn. (a)
How far has the sound travelled when the echo is heard on the ship?
(b)
The ship changes its distance from the cliff. When the echo time is 0.5
seconds, how far is the ship from the cliff? (take speed of sound as 340m/s)​

Reason i shouldnt turn back if i'm lost in the wilderness need fast

List 3 factors commonly used to select the location of a city

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?